MBMG-242411
Montana Bureau of Mines and Geology
Located in Madison County, Montana, this groundwater monitoring location is associated with a water well in the Northern Rocky Mountains Intermontane Basins aquifer systems.
Well Construction
| Depth | Description | |
|---|---|---|
| -2.0-158.0 ft | 6.0 in diameter a53b steel casing | |
| 143.0-153.0 ft | 6.0 in diameter perforated casing screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-35.0 ft | unknown | LIGHT TAN SILT |
| 35.0-40.0 ft | unknown | SILT TO COARSE SAND |
| 40.0-55.0 ft | unknown | SANDY SILT |
| 55.0-63.0 ft | unknown | CLAYEY SANDY SILT |
| 63.0-70.0 ft | unknown | MEDIUM-COARSE SAND |
| 70.0-74.0 ft | unknown | FINE SAND WITH SOME PEBBLE GRAVEL, WELL ROUNDED |
| 74.0-75.0 ft | unknown | MEDIUM SAND AND GRAVEL WITH SILT AND CLAY |
| 75.0-87.0 ft | unknown | COARSE SAND-FINE GRAVEL WITH SOME SILT AND CLAY |
| 87.0-95.0 ft | unknown | SILTY CLAY |
| 95.0-105.0 ft | unknown | NO CUTTINGS, POSSIBLY CLAY, NOTED MUD BALL |
| 105.0-143.0 ft | unknown | NO CUTTINGS |
| 143.0-150.0 ft | unknown | COARSE SAND AND SILT, 10-30 GPM |
| 150.0-154.0 ft | unknown | COARSE SAND, INDURATED, 40-60 GPM |
| 154.0-155.0 ft | unknown | SILTY FINE SAND, INDURATED, LOST WATER |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-242411 Site Number 242411 Site Type WELL Lat/Long (NAD83) 45.3158, -112.4488 Well Depth 160 Feet Elevation (NAVD88) 5183.81 ft Latitude 45.315768 Longitude -112.448824 Local Aquifer Name 120SNGR (None) National Aquifer Name Northern Rocky Mountains Intermontane Basins aquifer systems (S100NRMTIB) Aquifer Type UNCONFINED Water-Level Well Type Trend Water-Level Well Characteristics Background Water Quality Network Additional info Link 1 -
Activity Start Date Activity Start Time Characteristic Name Measure Value Units Detection Limit Value Type Sample Fraction Method Name Analytical Method System Sample Method ID Sample Method ID Context Sample Method Name Activity Type Code Data Provided By -
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How do we calculate statistics?
Overall Water Level Statistics (Depth to water, feet below land surface) Lowest Water Level Median Water Level Highest Water Level First Measurement Date Last Measurement Date Number of Measurements Years of Record Latest Value Latest Percentile 77.97 71.10 66.70 2008-02-22 2026-04-01 2946 18.2 69.57 61.54 Statistics Calculated 2026-05-19 Monthly Water Level Statistics (Depth to water, feet below land surface) Month Lowest Median 10th Percentile 25th Percentile 50th Percentile 75th Percentile 90th Percentile Highest Median Number of Measurements Years of Record Mar 73.18 73.15 72.55 69.80 68.46 67.41 67.32 12 12 Apr 73.08 73.08 72.35 70.46 69.01 67.75 67.74 12 12 May 73.99 73.93 73.00 71.49 69.10 68.14 68.13 10 10 Jun 75.36 75.35 74.66 72.35 69.43 68.22 68.20 10 10 Jul 76.22 76.03 74.11 71.67 69.75 68.66 68.58 10 10 Aug 77.40 77.30 76.20 72.21 70.24 68.46 68.34 10 10 Sep 77.07 76.75 75.11 71.10 70.53 68.06 67.95 11 11 Oct 75.67 75.47 74.17 71.36 69.36 67.77 67.61 11 11 Dec 73.83 73.73 72.71 70.35 68.18 66.95 66.83 10 10 Statistics Calculated 2026-05-19 -
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